I also forgot to mention that i have set the BalancerInherit to Off before loading the balancers definition. It unfortunatly doesn't change the behaviour.
Sylvain On Fri, Dec 19, 2014 at 11:04 AM, Sylvain Goulmy <sygou...@gmail.com> wrote: > > Hi Yann, > > Thank you for your feedback. > > My configuration is currently defining 338 virtual hosts and 169 proxy > balancers. > > The balancers are defined in the main section. Each virtual host refers > only one balancer. > > Here what i notice : > - Apache creates one shm for each balancer > - Each virtual hosts creates one shm for each balancer even if it doesn't > refer it... > > Am i missing a directive that could avoid that behaviour or do i have to > redesign my all configuration by moving each balancer definition at the > virtual host level ? > > Thanks in advance. > Regards. > > Sylvain > > > On Fri, Dec 19, 2014 at 12:06 AM, Yann Ylavic <ylavic....@gmail.com> > wrote: > >> If you can manage to recompile the APR library used by your Apache 2.4 >> (you probably did that already since 2.4 does not seem to be the >> version packaged with RHEL 6.4), you can use "./configure >> --enable-posix-shm ..." to use another shared memory mechanism than >> the default one (IPC SysV) which is limited to 32K segments (system >> wide). >> The number of segments would then be limited by the usual number of >> file descriptors per process (ulimit -n). >> >> Unfortunately, there no equivalent to the Mutex directive for shared >> memories, this can't be changed by httpd's configuration (as far as I >> know). >> >> On Thu, Dec 18, 2014 at 2:30 PM, Sylvain Goulmy <sygou...@gmail.com> >> wrote: >> > >> > I also noticed that a single proxy_balancer creates almost 350 shm on >> the >> > system. >> > >> > Is it normal that a single proxy_balancer creates so many shm ? >> >> How many VirtualHost(s) do you use in your configuration? >> Also, how do you declare the balancer(s), in each VirtualHost or in >> the main section using BalancerInherit on? >> >> > >> > Do i really have to increase the memory segment on my system in huge >> > proportion to handle all my proxy_balancers ? >> >> The number of IPC SysV shared-memory segments is limited to 32768 on >> linux (system wide), and you are already above with 100 * 350, so you >> would need to use another SHM mechanism. >> Unfortunately, there no equivalent to the Mutex directive for shared >> memories, AFAIK this can't be changed by httpd's configuration. >> So you would have to recompile the APR library used by your Apache 2.4 >> (you probably did that already since RHEL 6.4 does not seem to package >> 2.4 by default), and do for example "./configure --enable-posix-shm >> ..." to use another shared-memory mechanism. >> The number of segments would then be limited by the usual number of >> file descriptors per process (ulimit -n). >> >> However 350 shm per balancer looks weird to me, your configuration may >> do something not optimal... >> >> Regards, >> Yann. >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: users-unsubscr...@httpd.apache.org >> For additional commands, e-mail: users-h...@httpd.apache.org >> >>
